1) The male fish develops extended filaments on the dorsal fin.

2) The dorsal fin is ornamented with these two colours.

3) The eye-spotted dorsal fin is another distinctive feature.

4) The blennies have a single dorsal fin, which may be almost, but not completely, divided by a deep notch.

5) The dorsal fin is like a yacht sail; tall and similarly shaped.

6) Butterflyfish have a spiny dorsal fin, which they are quite prepared to use in attack.

7) Sometimes you may spot an occasional dorsal fin when it pops out like a miniature yacht sail.

8) New fibreglass wing tips and dorsal fin additions were attached.

9) The shape of the elongated spiky dorsal fin is reflected in the sweep of the flowing ventral fins.

10) The dorsal fin is spinous.

11) A goldfish LanChou belongs to the egg, dorsal fin.

12) Dorsal fin , tail fin and fat fins slightly yellow, pectoral fin , and ventral fin Tunqi gray.

13) The second dorsal fin, near the tail,(http://sentencedict.com/dorsal fin.html) is much smaller.

14) The shark's dorsal fin was cut off by the fisherman.

15) His dorsal fin was down and his huge pectorals were spread wide.

16) The eel has a real "continuous" vertical fin along the back (dorsal fin).

17) a shark's dorsal fin.

18) There is nothing clown-like at all about a pale pink fish with a light stripe along the base of the dorsal fin.

19) The male is larger and has a more pointed dorsal fin.

20) However it is easily identified by the large black blotch that covers a large proportion of its upper body and dorsal fin.

21) It has a wide space between it and the tiny, second dorsal fin.

22) The trigger, which gives the fish its name, is the leading ray of its dorsal fin which has become bony.

23) There is just a touch of yellow along the very top of the dorsal fin.

24) Crucian carp are also very similar but goldfish have a less-deep body and a shorter dorsal fin.

25) This is the mark in the water caused by the fish's dorsal fin.

26) This condition, called neoteny, means it keeps its tadpole-like dorsal fin, which runs almost the length of its body, and its feathery external gills, which protrude from the back of its wide head.

27) Perch: snub-nosed bony freshwater fish with an oval body and a spiny dorsal fin; the flesh of this fish is highly valued.

28) We established a kinematic model of the long-based undulatory fin on the basis of analyzing the long-based dorsal fin locomotion and considering the fluid-structure interaction.

29) They are cobalt-blue on top and silvery-white below, with a pronounced dorsal fin and a long, lethal, spear-shaped upper jaw.

30) In typical mammalian fashion, the newborn's head is disproportionately large, and its tail stock, the region between the dorsal fin and flukes, is relatively short.